Visible Proof (2013)

At the turn of the 20th Century, two detectives arrive from Buenos Aires to investigate the gruesome murder of two children. When their wounded mother accuses a neighbor of the crime, Juan Vucetich and his partner Eduardo Alvarez employ an unorthodox new method in their search for clues. What they find leads to the first crime solved by fingerprints, based on the true story of the case which pioneered modern forensics.